The grade assigned by a lab to assess the Clarity. Clarity is one of the Four C’s, and is extremely important in assessing the value of a diamond. It is not ENOUGH to use the Four C’s however, if you want to avoid the scams, so do not stop there, and be sure to take my full tutorials.

The most common question I receive is: “What grade is Eye-Clean?” Generally, SI1 or higher are free of inclusions and blemishes to the eye, according to GIA (but most jewelers avoid that term now).

Clarity Grade is one of the Four C’s.

See :: the page on Clarity Grade in the Diamond Four C’s tutorial.

Here is how I would compare the grading definitions of the various main labs around the world ::

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